Unauthorized purchase

1. This is a user to user forum. You are not addressing Apple or iTunes Billing. As users we cannot clear anything up.
2. If this charge is only showing up in an email, make sure its actually from Apple. Most of those emails are scams or phishing attempts. See here: Identify legitimate emails from the App Store or iTunes Store - Apple Support
3. You can verify any purchases made on your account by following the steps here: See your purchase history in the App Store or iTunes Store - Apple Support
4. You can contact iTunes Billing directly by filling in this form: iTunes Store - Contact Us - Official Apple Support

A random post in a public forum is not going to get anything accomplished.

It is a phishing attempt. Do not respond. Do not divulge any personal or financial information. You can use the address below to forward the suspect email message, as an attachment to Apple.

reportphishing@apple.com

The link below has information to help identify fraudulent emails.

https://support.apple.com/en-us/HT204759

Apple will always address you by your name or the name they have on file for you, not Dear Customer, Dear Client or by using your e-mail address.  The e-mail will be from @apple.com or @iTunes.com. E-mail addresses can be spoofed. You can go to Mail/View/Message/Show all Headers to see more. Apple e-mails will never contain an attachment. Apple will never request personal information by email such as Social Security numbers, your Mother’s maiden name or full credit card numbers .

The only exception to the above I have noticed is if you order something from the Apple Store (apple.com), your receipt will be addressed to Dear Apple Customer. That is a receipt for a purchase you initiated.

Check your purchases:

See your purchase history in the App Store or iTunes Store - Apple Support

If it doesn't appear there then it is phishing.